/Engine/Source/Runtime/GeometryCore/Public/Generators/MarchingCubes.h
Assume we just want to slide cell at XIdx-1 to cell at XIdx, while keeping yi and ZIdx constant. Then only x-coords change, and we have already computed half the values
void shift_cell_x ( [FGridCell](API\Runtime\GeometryCore\Generators\FMarchingCubes\FGridCell) & Cell, int XIdx )